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| author |   Sudeep Holla <sudeep.holla@arm.com> | 2018-07-06 12:02:44 +0100 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2018-07-06 13:18:18 +0100 |
| commit | 5bdd2b3f0f8830f281bb568e65df6eabf655dd0d (patch) | |
| tree | 1ff3a6e9af105a7fd99aa6df731a36246261e2c1 /arch/arm64/kernel/topology.c | |
| parent | arm64: numa: separate out updates to percpu nodeid and NUMA node cpumap (diff) | |
| download | linux-dev-5bdd2b3f0f8830f281bb568e65df6eabf655dd0d.tar.xz linux-dev-5bdd2b3f0f8830f281bb568e65df6eabf655dd0d.zip | |
arm64: topology: add support to remove cpu topology sibling masks
This patch adds support to remove all the CPU topology information using
clear_cpu_topology and also resetting the sibling information on other
sibling CPUs. This will be used in cpu_disable so that all the topology
sibling information is removed on CPU hotplug out.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Tested-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/topology.c')
| -rw-r--r-- | arch/arm64/kernel/topology.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c index b64733c5ea28..cb81df545359 100644 --- a/arch/arm64/kernel/topology.c +++ b/arch/arm64/kernel/topology.c @@ -322,6 +322,20 @@ static void __init reset_cpu_topology(void) } } +void remove_cpu_topology(unsigned int cpu) +{ + int sibling; + + for_each_cpu(sibling, topology_core_cpumask(cpu)) + cpumask_clear_cpu(cpu, topology_core_cpumask(sibling)); + for_each_cpu(sibling, topology_sibling_cpumask(cpu)) + cpumask_clear_cpu(cpu, topology_sibling_cpumask(sibling)); + for_each_cpu(sibling, topology_llc_cpumask(cpu)) + cpumask_clear_cpu(cpu, topology_llc_cpumask(sibling)); + + clear_cpu_topology(cpu); +} + #ifdef CONFIG_ACPI /* * Propagate the topology information of the processor_topology_node tree to the |